Android :: Not Connecting To Web Page

I got a code for connecting the web page but it shows always
"Connection failed; Host is unresolved: www.streetcar.org:80" The code is as follows. package myapp.httpdwnd;
import android.app.Activity;
import java.io.InputStream;
import android.os.Bundle;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;